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    Office 365 emails sent to my PMG our getting 550 5.4.316 Message expired, connection refused

    My problem was actually Geo-IP-blocking in the router, the confusing part was this was also reporting 450 responses. So when they were 450 caused by the router the proxmox would never see it to log it.
  2. B

    Office 365 emails sent to my PMG our getting 550 5.4.316 Message expired, connection refused

    I have a situation which appears very similar, but is there any explanation as to why the greylisting attempts would NOT show in the tracking center?
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